package com.xcw.bos.utils;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * 使用md5的算法进行加密
 * @author xcw
 *
 */
public class MD5Utils {

    public static String md5(String plainText){
    	byte[] secretBytes = null;
    	try {
			secretBytes = MessageDigest.getInstance("md5").digest(plainText.getBytes());
		} catch (NoSuchAlgorithmException e) {
			throw new RuntimeException("没有md5这个算法！");
		}
    	String md5code = new BigInteger(1, secretBytes).toString(16);//16进制
    	//如果生成数字未满32位，需要前面补0
    	for(int i = 0; i < 32 - md5code.length(); i++){
    		md5code = "0" + md5code;
    		
    	}
    	return md5code;
    }
    
    public static void main(String[] args){
    	System.out.println(md5("123"));
    }
}
